package com.example.demofdfs.jsch;

/* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */
/**
 * This program enables you to connect to sshd server and get the shell prompt.
 *   $ CLASSPATH=.:../build javac Shell.java 
 *   $ CLASSPATH=.:../build java Shell
 * You will be asked username, hostname and passwd. 
 * If everything works fine, you will get the shell prompt. Output may
 * be ugly because of lacks of terminal-emulation, but you can issue commands.
 *
 */
import com.jcraft.jsch.*;
import java.awt.*;
import javax.swing.*;

import org.apache.kafka.common.config.types.Password;

public class Shell{
  public static void main(String[] arg){
	  Channel channel = null;
	  JSch jsch=new JSch();
	  Session session = null;
    try{

      //jsch.setKnownHosts("/home/foo/.ssh/known_hosts");

//      String host=null;
//      if(arg.length>0){
//        host=arg[0];
//      }
//      else{
//        host=JOptionPane.showInputDialog("Enter username@hostname",
//                                         System.getProperty("user.name")+
//                                         "@localhost"); 
//      }
//      String user=host.substring(0, host.indexOf('@'));
//      host=host.substring(host.indexOf('@')+1);

      String host = "192.168.244.146";
      String user = "root1";
      String passwd = "root";
      
      session=jsch.getSession(user, host, 22);

//      String passwd = JOptionPane.showInputDialog("Enter password");
      session.setPassword(passwd);

      UserInfo ui = new MyUserInfo(){
        public void showMessage(String message){
          JOptionPane.showMessageDialog(null, message);
        }
        public boolean promptYesNo(String message){
          Object[] options={ "yes", "no" };
          int foo=JOptionPane.showOptionDialog(null, 
                                               message,
                                               "Warning", 
                                               JOptionPane.DEFAULT_OPTION, 
                                               JOptionPane.WARNING_MESSAGE,
                                               null, options, options[0]);
          return foo==0;
        }

        // If password is not given before the invocation of Session#connect(),
        // implement also following methods,
        //   * UserInfo#getPassword(),
        //   * UserInfo#promptPassword(String message) and
        //   * UIKeyboardInteractive#promptKeyboardInteractive()

      };

//      session.setUserInfo(ui);

      // It must not be recommended, but if you want to skip host-key check,
      // invoke following,
       session.setConfig("StrictHostKeyChecking", "no");

      //session.connect();
      session.connect(30000);   // making a connection with timeout.

      channel=session.openChannel("shell");

      // Enable agent-forwarding.
      //((ChannelShell)channel).setAgentForwarding(true);

//      channel.setInputStream(System.in);
      /*
      // a hack for MS-DOS prompt on Windows.
      channel.setInputStream(new FilterInputStream(System.in){
          public int read(byte[] b, int off, int len)throws IOException{
            return in.read(b, off, (len>1024?1024:len));
          }
        });
       */

//      channel.setOutputStream(System.out);

      /*
      // Choose the pty-type "vt102".
      ((ChannelShell)channel).setPtyType("vt102");
      */

      /*
      // Set environment variable "LANG" as "ja_JP.eucJP".
      ((ChannelShell)channel).setEnv("LANG", "ja_JP.eucJP");
      */

      //channel.connect();
//      channel.connect(3*1000);
    }
    catch(Exception e){
    	
    	e.printStackTrace();
    	System.out.println(e.getMessage());
    } finally {
    	if (session != null) {
    		session.disconnect();
    	}
    	if (channel != null) {
    		channel.disconnect();
		}
    }
  }

  public static abstract class MyUserInfo
                          implements UserInfo, UIKeyboardInteractive{
    public String getPassword(){ return null; }
    public boolean promptYesNo(String str){ return false; }
    public String getPassphrase(){ return null; }
    public boolean promptPassphrase(String message){ return false; }
    public boolean promptPassword(String message){ return false; }
    public void showMessage(String message){ }
    public String[] promptKeyboardInteractive(String destination,
                                              String name,
                                              String instruction,
                                              String[] prompt,
                                              boolean[] echo){
      return null;
    }
  }
}
